package com.dzt.androidframework.utils;

import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.telephony.TelephonyManager;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

import java.io.File;
import java.security.MessageDigest;
import java.util.List;

/**
 * Created by M02323 on 2017/7/8.
 */

public class JSystemKit {

	/**
	 * 获取手机IMEI码
	 *
	 * @param cxt
	 * @return
	 */
	public static String getPhoneIMEI(Context cxt) {
		TelephonyManager tm = (TelephonyManager) cxt
				.getSystemService(Context.TELEPHONY_SERVICE);
		return tm.getDeviceId();
	}

	/**
	 * 获取手机系统SDK版本
	 *
	 * @return 如API 17 则返回 17
	 */
	public static int getSDKVersion() {
		return Build.VERSION.SDK_INT;
	}

	/**
	 * 获取系统版本
	 *
	 * @return 形如2.3.3
	 */
	public static String getSystemVersion() {
		return Build.VERSION.RELEASE;
	}

	/**
	 * 隐藏系统键盘   必须是确定键盘显示时才能调用
	 *
	 * @param aty
	 */
	public static void hideKeyBoard(Activity aty) {
		((InputMethodManager) aty
				.getSystemService(Context.INPUT_METHOD_SERVICE))
				.hideSoftInputFromWindow(
						aty.getCurrentFocus().getWindowToken(),
						InputMethodManager.HIDE_NOT_ALWAYS);
	}

	public static void hideInputWindow(Context context, View view) {
		InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
		imm.hideSoftInputFromWindow(view.getWindowToken(), 0); //强制隐藏键盘
	}

	public static boolean isBackground(Context context) {
		ActivityManager activityManager = (ActivityManager) context
				.getSystemService(Context.ACTIVITY_SERVICE);
		List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager
				.getRunningAppProcesses();
		for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
			if (appProcess.processName.equals(context.getPackageName())) {
				if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
					// 后台运行
					return true;
				} else {
					// 前台运行
					return false;
				}
			}
		}
		return false;
	}

	/**
	 * 安装apk
	 *
	 * @param context
	 * @param file
	 */
	public static void installApk(Context context, File file) {
		Intent intent = new Intent();
		intent.setAction("android.intent.action.VIEW");
		intent.addCategory("android.intent.category.DEFAULT");
		intent.setType("application/vnd.android.package-archive");
		intent.setData(Uri.fromFile(file));
		intent.setDataAndType(Uri.fromFile(file),
				"application/vnd.android.package-archive");
		intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		context.startActivity(intent);
	}

	/**
	 * 获取当前应用程序的版本号
	 *
	 * @param context
	 * @return "1.1.1"
	 */
	public static String getAppVersionName(Context context) {
		String version;
		try {
			version = context.getPackageManager().getPackageInfo(
					context.getPackageName(), 0).versionName;
		} catch (PackageManager.NameNotFoundException e) {
			throw new RuntimeException(JSystemKit.class.getName()
					+ "the application not found");
		}
		return version;
	}

	/**
	 * 获取当前应用程序的Code
	 *
	 * @param context
	 * @return 3
	 */
	public static int getAppVersionCode(Context context) {
		int version;
		try {
			version = context.getPackageManager().getPackageInfo(
					context.getPackageName(), 0).versionCode;
		} catch (PackageManager.NameNotFoundException e) {
			throw new RuntimeException(JSystemKit.class.getName()
					+ "the application not found");
		}
		return version;
	}

	/**
	 * 回到home，后台运行
	 *
	 * @param context
	 */
	public static void goHome(Context context) {
		Intent mHomeIntent = new Intent(Intent.ACTION_MAIN);
		mHomeIntent.addCategory(Intent.CATEGORY_HOME);
		mHomeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
				| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
		context.startActivity(mHomeIntent);
	}

	/**
	 * 获取应用签名
	 *
	 * @param context
	 * @param pkgName
	 * @return
	 */
	public static String getSign(Context context, String pkgName) {
		try {
			PackageInfo pis = context.getPackageManager().getPackageInfo(
					pkgName, PackageManager.GET_SIGNATURES);
			return hexdigest(pis.signatures[0].toByteArray());
		} catch (PackageManager.NameNotFoundException e) {
			throw new RuntimeException(JSystemKit.class.getName() + "the "
					+ pkgName + "'s application not found");
		}
	}

	/**
	 * 将签名字符串转换成需要的32位签名
	 *
	 * @param paramArrayOfByte
	 * @return
	 */
	private static String hexdigest(byte[] paramArrayOfByte) {
		final char[] hexDigits = {48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97,
				98, 99, 100, 101, 102};
		try {
			MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");
			localMessageDigest.update(paramArrayOfByte);
			byte[] arrayOfByte = localMessageDigest.digest();
			char[] arrayOfChar = new char[32];
			for (int i = 0, j = 0; ; i++, j++) {
				if (i >= 16) {
					return new String(arrayOfChar);
				}
				int k = arrayOfByte[i];
				arrayOfChar[j] = hexDigits[(0xF & k >>> 4)];
				arrayOfChar[++j] = hexDigits[(k & 0xF)];
			}
		} catch (Exception e) {
		}
		return "";
	}

	/**
	 * 获取设备的可用内存大小
	 *
	 * @param cxt
	 * @return 当前内存大小
	 */
	public static int getDeviceUsableMemory(Context cxt) {
		ActivityManager am = (ActivityManager) cxt
				.getSystemService(Context.ACTIVITY_SERVICE);
		ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
		am.getMemoryInfo(mi);
		// 返回当前系统的可用内存
		return (int) (mi.availMem / (1024 * 1024));
	}

	/**
	 * 清理后台进程与服务
	 *
	 * @param cxt
	 * @return 被清理的数量
	 */
	public static int gc(Context cxt) {
		long i = getDeviceUsableMemory(cxt);
		int count = 0; // 清理掉的进程数
		ActivityManager am = (ActivityManager) cxt
				.getSystemService(Context.ACTIVITY_SERVICE);
		// 获取正在运行的service列表
		List<ActivityManager.RunningServiceInfo> serviceList = am.getRunningServices(100);
		if (serviceList != null)
			for (ActivityManager.RunningServiceInfo service : serviceList) {
				if (service.pid == android.os.Process.myPid())
					continue;
				try {
					android.os.Process.killProcess(service.pid);
					count++;
				} catch (Exception e) {
					e.getStackTrace();
					continue;
				}
			}

		// 获取正在运行的进程列表
		List<ActivityManager.RunningAppProcessInfo> processList = am.getRunningAppProcesses();
		if (processList != null)
			for (ActivityManager.RunningAppProcessInfo process : processList) {
				// 一般数值大于RunningAppProcessInfo.IMPORTANCE_SERVICE的进程都长时间没用或者空进程了
				// 一般数值大于RunningAppProcessInfo.IMPORTANCE_VISIBLE的进程都是非可见进程，也就是在后台运行着
				if (process.importance > ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE) {
					// pkgList 得到该进程下运行的包名
					String[] pkgList = process.pkgList;
					for (String pkgName : pkgList) {
						try {
							am.killBackgroundProcesses(pkgName);
							count++;
						} catch (Exception e) { // 防止意外发生
							e.getStackTrace();
							continue;
						}
					}
				}
			}
		return count;
	}
}
